Television system and apparatus



Oct. 31, 19.39. wl soLLER TELEVISION SYSTEM AND,PAFPARITUSl Filed Aug. 2l, 1937 5 Sheets-Sheet l wir-:

hITL-m5 IN V EN TOR.

T @Wa/652m @wee/g, co.

ATTORNEY l aufm/r Oct. 31, 1939. w. soLLER TELEVISION SYSTEM AND APPARATUS Filed Aug.. 2l, 1937 3 Sheets-5h66?I 2 :E Ira-..1 E

INVENTOR. 2F/am QSO/6&9,

BY l

ATTORNEY Oct. 31, 1939.

w. soLLER TELEVISION SYSTEM AND APPARATUS Filed Aug. 21I 1937 3 Sheets-Sheet 3 :E: Vif-1E IN V EN TOR.

Patented Oct. 31,1939

PATENT. OFFICE TELEVISION SYSTEM ANDABPARATUS n' walter sauer, Cinennatrohio, assigner of onehalfto William H; Woodin, Jr., Tucson; Ariz.

17 Claims.

,.- -My invention relatesrbroadly to television sys- .tems and more particularly to a system yfor trans- ,rnittingand;reproducingl images by employing `scanning devices functioning in one dimension .onlygfrI y. .1a. I y

4One of the objects oilmy inventionis to providel a s in'ipliiiedk construction of television trans- ,mitting'and-receivi-ng apparatus employing scan- .llingmeans deflected in one dimension only across -the :object to be. televised. t t i. f .Anotherobject of my .invention is to provide a simplified construction of photosensitive scanning means having avplurality of individual pho-r .,toelectricelements voperative in combinationto View.simultaneously a linear portion ofthe obrvl'et'to be televised, the vobject being scanned solelyin a direction substantially normal v to the linear fportion simultaneously viewed.

Q A further object of my. invention is toprovide igkzvan.:electrical circuit arrangement and means lfor zsimultaneouslymodulating a plurality of subcarrier currents bythe light :intensity onga pluv,rality olf-,points in anobject scanned, each subc'arriencurrentbearing modulations of a linear portion of the object inthe direction of scanning oi the objectby-alinear scanningelement extendy yi-,ng'normal tothe direction of scanning.y f

,I i till another object of my invention isr to-pro- Ivinde aysimpliiiedv*arrangement of jtelevision re- .,fceiving `.means forv cooperation with the type of vtransmitter'described, and wherein a plurality ofi-yibratorylight shutters are operated bylelect .tromechanical.selective devices actuated bythe .currents'fof.sub-carrier frequency inthe received 1, A still further object ofpmytinvention is to pro- -...vide means at the receiver,fcooperative with a beam o4fjli'ght comprising a plurality of` raysof ,rying intensity, forrdeectingsuch beam of light .40. across a screen y -in synchronism with scanning means ,at the transmitter.

tillfanother object of my invention` is `to prolvvid'e-means-for transmitting images from pho- AL,tographic motion picture film by viewing the lm acrossfits ,widthjsimultaneously by al plurality of @light sensitive'. elements arranged linearly, the film beingsanned Icy-relative motion of the nlm and A"the light `sensitive elements in a direction-along I y,fthe length of thelm, which ymay 4beeffected .ybynioving the vfilm at constant speed acrossa Vlinearfyiewing aperture.l t. I y ,Y ',151' f sn' further. y@Injector my invention ist@ translating ,means rin a television receiver operative by a complex current comprising, a Apluz-.ralitr @f1.Sepafateli.. modulated acurreetsfef, .dif-

i provide l' y ypplication August y21,

1937, serial4 N0. 16o,332 (o1. .11s-*7.6)

ferent frequencies, the translating means provid- [ing frequency separation and light modulation simultaneouslyin'the same structure.

A further .object of my invention is to provide a television rsystem requiring a relatively narrow frequency bandjby virtue 'of` electromechanical, Iselectively responsive tuned vibrating elements. Othery andfurther vobjects of my invention relside inthe'structurey and arrangements of telejvision apparatus hereinafter fullydescribed with reference.V to the accompanying drawings in which: I. F Figure l'is a side elevation partly in section ,of the television cameraapparatus of my invention;,-Fig". is aplan view thereof with parts in` I section; FigQS isa vertical sectional view thereof taken on line 3%3 in Fig. 1; Fig. 4 is a horizontal vsection onan enlarged scale, taken on line 4 4 `lin .Fig`.1`throughthe photoelectric device emy f ployzeclin my linvention Fig. 5 is a schematic diagram of the'jcircuitA connections of the modulatjing systemof myV invention; Fig. 6 vis a diagramniaticshowing of/th'e adaptability of the system vfof lmyl invention to the transmission of images from photographic. motion picturelm; Fig. 7 is a' plan viewfof'receiving apparatus cooperative in the rtelevisir'l system of my invention, showing f theY arrangement of reciprocatory or oscillating Y synchronizing means vand frequency kselective and ,-.trans'latng means; Fig. rk8 isany elevation on an enlargedjscale of -the oscillating mirror support land actuating meansyFig. 9` is a. horizontal sectional viewthereof on line .9-9 in Fig. 8; Figfl t, fvi's `a"iull'elevation on ar smallerscale of the fre- 4 quericy selective .and translating' means, showing especially, r`the foreshortened core structure for N muntingthe field and the actuating coils; Fig. -11 Y, is anenlarged detail view in section on line I I-l I in Fig. y'7; Fig. y12 is a front elevation on an enx,larged ,scal'eo'f .the shutter mechanism, which is f shov'vn also in Figs. 7 and 11; Fig. l3is a schematic diagram ofthe circuit arrangement in the receivjingjsystemoi .my invention; Fig. 14` diagramrnatiycally illustrates a modified form of synchrojniingldevice which may be employed with the scanning arrangement of Fig. 6; Fig. 15 illustrates al'modiedyiorm of the structurelshown in Fig. 7, 'p'a'rticularly adapted for the selection of higher 'sub-carrier.frequencies; Fig. 16 is a detailed view of amodied form 'of shutter mechanism; Fig. 17 is "a front vview offa radio and televisionreceiver cabinet showingthe relation of the apparatus of myjinventionj and Fig. 18 isa horizontal sec- .tional view at Aline Iii-I8 in Fig.l 1'7 illustrating '[thevapp'aratus, offFig. 31 within theicabinet.

My invention employs mechanical scanning apparatus broadly of the` type operating in one dimension and scanning the object in linear elements. The subdivision of the linear elements into substantiallyy point units is effected by a special construction of photoelectric device comprising a stack of photosensitive elements each individually insulated and connected with a subcarrierchannel inthe system. A common anode is employed in the photoelectric device, .cooperating with'all the photosensitive elements. The effect of scanning apparatus of this type i's a division of the imageinto linesV alongonly one dimension, the vision in the 'other dimension'being blended in accordance with the smoothness of operation'of the scanningmechanism.

The number of lines which maybe accommodated in the system of my'invention is adaptable to the degree of precision desired. A-ftransmitter employing upwards of 500 lines along the subdivvided r dimension mayvserve 'receivers of'different I ".fsynchronous motor"9. It will be'understood that t-any 4:suitable reciprocatory drive mechanism may adjusting ymeans I4"fo'r Ycapacities up to the'maximurn number oflines provided vat the transmitter. VReceiversbff less Athan maximum capacityA may be designed to reproduce the'y entire image transmitted but with va sacrifice of clarity'by selecting yforreproduction only certain onesof-thellines transmitted.; Other receivers of less-than" maximum capacity may be designed to `reproduce vthe lcentral lportion only .of the image, with full' clarity,f`which-will be'satisfactory inasmuch asfthe "principal action ini the view generally 4 occurs y in the central portion.

thereof. v y

4`Referring to 'the irawinvgs'iny more detail, Figs. l`1`-'3 illustrate an arrangemer'ity employing a muljtiple photoelectric device'Lmounted on'a reciproca'tory' V,carriage `2, 4whichris` mountedv by Ineans of rollers 3, on rails"4,disposed'-crosswise4 'of the supporting ystructure, indicatedfgenerally vat 5. Afih-e'fcarriage `2 as shown is adapted-4 to `^be"driven through a Scotch yoke mechanism, comprising 'a slot 6,y Iin lthe carriage 2, and an eccentric'drive -member 'I c mounted on; a flywheel "Il ,jdriven Aby jbefeinployedv for moving the photcelectricdevice *I lieufof the Scotch yoke' mechanism shown.

' A casingIIJ iskmounted onl theb'asestructure f and encloses the Vv'reciprocatcry "photoelectri'c Avrassembly. An `opticall'enssystem AI2 ismounted fin the forepart 'of thecasing I 0 Eandprovided,with y focusing an limage of 'the object to be ytelevisedin=the"plane'indicated atll. Thephotoelectric device I, as seen more `clearlyin Fig. 4 comprises avseries of conductive lamina'- tions Ia having the forward edges thereof, photosensitive. Disposed infront ofthe photosensi- 'tive assembly,'formed by the photosensi'tive edges of the conductivelaminations,'is an anodestructure comprising `two elongated plate members :Ib 'and Ic arranged with a verticallyextending nar- `row slitY Id separating the two members. :This slit 'Id constitutes the scanning slit of the`-appa ratus and the plane I5 of theimage focused by lensy systemy I2vcoincide`s withl'the reciprocatory path ofthevs'lit Id; as'indicatedcle'arlyin Fig, 4. The portion or theimage in' the' plane 15, scanned bythe slit Id, is indicated in Figj at |511.y which denes the frame of the'image transmitted. 70

'Referring again t'o'jFig, 4,' the photosensitive aridanode assemblies are` supported "within an envelope Ie, 4having a plane 4'tran spairentportion I`e",vin' frcnt.offthe slit I`d,"1andA the remainder of `V the surface thereofrendered cpaqueby a coating If. Connections jareinade to 4theco'nductive photcsensitive laminations Ia, in staggeredarrangement by conductors Ig passing through the wall of the envelope Ie. Connections to the anode structure are made in a similar manner, as will be understood. Intermediate the conductive laminations Ia, are arranged insulating laminations of mica or like material. 'I'he conductive and insulating laminations are supported between j end plates Ih and clamped by bolts Ii.

Fig. 5 indicates schematically an arrangement of vmodulating system employing the multiple frefquency mechanical alternator device shown in my copending application Serial Number 733,300, filed June 30, 1:9345for Television system. Coils I6, I6',

\.I16v are energized rby direct current to prof duce magnetic fields in the core structures I1, II',

I'I The reluctance of the magnetic circuits is mechanically varied at different-frequencies so thatalternating currents of different frequencies are induced in the coils I8,I8, I8 The photosensiti-veelements Ia, Ia', Ict are con- Ynected respectively with one terminal of the coils 4I8, '-I8, -I8 andthe anode structure vis'lconnectedfthr'ough a. source-of potential I9', and Aa load resistance 2D in common with the otherlter'- minals of coils" I8, .I8,I8..- Output terminals are 'connected across theresistance 20, as shown, the current therethrough being a complex current having as components theinodulatedsubcarrier currents from Vthe several-coils "I'8,` I8', I8 and photosensitive elements' Ia, Ict"l !alr* i l c f c .y

Fig` `6 illustrates an arrangement'fforithe use atfZI is arranged so that its 'directiono'f motion y ofphotographic'motion' picture-filmas the'fsour'ce of images tobe transmitted. V"'Iheilm indicated `l35 is normal to the axis of the photoelectric device I. vLight rays from a source-23 -are'paralleled'by lens 24 and passed through thel lm l2h-and thence through-'a spreading lens-arrangementZS "so'as to embrace the longitudinal dimension of kthe photoelectric device I and thevseries of photosensitive elements therein, as indicated. Recip- 'rocatorymovement of the photoe'lectr'ic# device I either' vertically, orhorizontally hereinbefore cle-'F45' scribed, is necessary when the film is moved intermittently, -in which case, the intermittent movement ofthe `film should'be synchronized atv n the transmitter with thescanning'period. However, it is' possible .to trans'r'nitY from vfthe film-"by running it ata constant speed'relativeto-'a rstationery photoelectric deviceffl. yIn this'arrange.- merit however, rotary synchronous `means must V`vbe providedat the receivenlas will be hereinafter more fully set forth.

` fv-Fig. `'7 illustrates -an arrangement 'of "translat- `ing -apparatuslwhich may be :employed in vlconjunction with-'the transmitter -hereinbeore HAdef scribed with respect to Figs. "1e-5.; y Vrl'he' apparatus comprises-a laminated l`magneticfcorestructure 26, with opposite polesthereof embracing Vafse1"ies vo'f'magnetic vibratible tuned 'reeds'indicated generally at 2l'.k Onepol'e'of -the corewstructure is recessedas at 26aft'o providefa 'mounting foran elongated tubular lamp 2-8having a v:iilament 28ar -or other means producing luminescence within 4vibratible reeds 2l'.

-catedfgeneraiiyat connected with thetuned r`Mountedr on-fthe corestructure'26areia pair) off 28f-i's shielded by a' cover- Ling member `29-having aseries of apertures 30 "I'hesejapertures '3II` coils '32- fed with direct current from a suitable source of supply for magnetizing and creating a magnetic eld of optimum flux density; and also mounted on the core structure yis an -actuating coil 34 fed with the complex current which relight formedv of individual rays of varying intensity disposed in linear relation. vEach shutter device 3| is formed of a/'single piece of die-cut sheet metal having wings bent to provide a shut ter portion 3| a and a supporting portion 3|b offering minimum obstruction to light when the shutter is displaced to positions las indicated yby shutter 3| in Fig. 12. Thesupporting portion 3|?) is fixed to a reed by soldering or brazing, or in any suitable manner.

vAs illustrated in Fig. 10, the portion'of the core structure 26 on which coils 32 and 34 are mounted is foreshortened to facilitate construction and design, while the pole portions of the core are of a length necessary to embrace all of the tuned vibratible reeds. A support 35 is provided under the foreshortened portion of the core structure 26;

Figs. 8 and 9 illustrate in more detail the oscillating mirror structure adapted to be synchronized with the reciprocation of the photoelectric device I, at the transmitter. The apparatus comprises an elongated mirror, 35 of a length adaptedto correspond to that of the lamp 28,` mounted in a support 31 pivoted at its upper and lower ends in antifriction bearings mounted in a frame structure 38. Actuating means for oscillating Vthe mirror, as shown particularly in Fig. 9 consist ofan arm 39 extending from the support 31, and mounting an actuating oscillating coil 48, which is disposed ina constant magnetic eld provided by eld coils 4 and fixed core structure 42. The oscillating kcoil is fed with synchronizing current from the television lreceiver and operates within a limited arc; Adjacent the lower pivot of the support 31, I provide a spiral spring device 43 fixed to the support 31 and a pin 45 connected with the fram-e structure 33. The spiral spring 43 is so constructed with respect to the mass of the oscillating assembly, including supports 31 and 39, mirror 36 and coil 4U, that the combination constitutes a` torsional pendulum oscillating at substantially the frequency of the scanning operation at the transmitter. Thus, the synchronizing current fed to the coil 4D need only be of such magnitudeas to maintain synchronism and overcome friction in the oscillating assembly. l

The general arrangement of the circuit connections in the receiving system of my invention is shown in Fig. 13, wherein the demodulated radio frequency energy comprising synchronizing and modulated sub-carrier components, is impressed 'on the grid circuit of a finial amplifier tube 46. In the anode circuit of the tube, a selective path is provided throughachoke coil41 and a transformer 48,'.having a tunedfsecondary, to

separate the current of synchronous frequency which is then further amplified if necessary, and fed to the oscillating coil 4U of the reconstructing apparatus. Amplitude and phase adjusting means are provided at 49 and 50, respectively, in I the synchronizing circuit. Also, in the anode circuit of tube 46, I provide a path, including low frequency blocking condenser 5| for excluding synchronizing currents of scanning frequency, by which the complex current comprising modulated sub-carrier currents is impressed on the actuating coil 34 of the translating apparatus. Connections to the iield coils of the translating and reconstructing apparatus are indicated at 55.

As shown in Fig. 7 and further indicated in Fig. 13, light rays passing through apertures 3) are directed through focusing lens means as at 52 and reflected by mirror 36 onto a screen 53, which is placed at a predetermined distance from the It will be understood that the vertical= mirror. dimension of the image is determined by the kheight of the elongated lamp 28 and the series of Ashutters 3 I whereas the width is dependent upon the arc of oscillation of the mirror 36 and the distance to the screen 53.

Referring to the transmitting arrangement indicated in Fig. 6 and the conditions for transmitting from a constantly driven film, Fig. 14 illustrates the modied form of receiver required to reconstruct the image thus transmitted. In place of the oscillatory mirror 36, a rotary mirror 54 is provided and arranged to be driven by a synchronous motor 56, maintained in synchronism with the film driving means at the transmitter. ror 36 deflects the beam of light rays from lamp 23 across the screen 53 once for each frame of themotion picture film. Also, it will be further understood that in the conventional arrangement such reconstruction will be in a vertical direction,

in differentiation from the horizontal oscillatory deflections. The arrangement as described in connection with Fig. 6 contemplates this vertical vscanning arrangement, but it is to be understood that when the film is run intermittently, the directional relation of the photoelectric device andthe lm may be altered so that each frame in the film is scanned crosswise while stationary and intermittent movement of the film is synchronized with the scanning operation. Under these conditions the preferred oscillatory mirror reconstructing apparatus is employed as hereinbefore described.

The modified form of translating apparatus shown in Fig. is adaptable for the support of vibratible reeds tuned for higher frequencies of vibration. The relatively more rigid construction `provides a support 51 at both ends of reeds 58, vwhich although longer than the reeds 21 are designed for higher frequencies of vibration. Shutters 3| are afxed to the reeds 58 as hereinbefore described and the modified structure is otherwise similar to that shown in Fig. 7. Tuned vibratible reeds are provided to cover a substantial audio or super-audio frequency band and it is intended therefore that the reeds be constructed and mounted in such manner as to vibrate at the required frequencies. It may be that in some instances magnetic wires may be found more adaptable for higher frequencies of vibration, in which case the modified form shown in Fig. 15 may be employed with a fixed support for the wires at-one side and individual tuning means at ythe other. The reeds or wires are adapted to vi- 4brate attheir fundamental frequency `whereby It will be understood that the mir-- `the receiver.

with the maximum amplitude for any condition.

Fig. 16 illustrates a `modified form of shutter arrangement which comprises a pairof apertured plates 59 and 6E! superimposed :over the aperture 39 with the apertures Vtherein normally out lof alignment andfclosed. The plate 59 is supported by rod 6i fixed to atuned vibratible reed 2lv and pivotally connected with one end of a' crank member 62 supported on a rod 63, which may eX- tend the length of the core structure 26 for supporting each crank member. The plate 60 is mounted on rodli pivotally connected with the other end of the crank-member 62. yIn operation, when the reed 2l is displaced upwardly, as seen in Fig. i6, plate 59 is moved upwardly and plate @il downwardly, bringing the apertures therein in alignment opposite aperture 3U and lamp i728. The degree of opening through the apertures in the plates 59 and 6B is proportional to the deflection of the reed 2.

In Figs. 17 and 18 I have indicated themanner in which the television` receiving apparatus of my invention, shown in Fig. 7, is mounted in a cabinet structure, 66, in combination with la radio receiver. In the upper portion of the cabinet I provide `a radio receiver with sound -reproducingrmeans indicated at-65 and 61. In the lower portion of 4the cabinet 66 are mounted the means 59, with the focusing lens 52, which may be adjustable, as shown more clearly in Fig. 18. A power supply unit is included at T0. The oscillating mirror 36 is disposed adjacent the front of the cabinet and an elongated opening 66a is provided in the cabinet in alignment with the mirror, through which the beam of light from` lamp 28, within the apparatus at 68 is reiiected. The screen 53 is provided on` an opposite wall of the room, the required distancefrom Adjustable lens 52 permits limited variation of the distance. A receiver accommodating 480 lines and allowing one-sixteenth inch height for each shutter requires a lamp, lens and mirror approximately thirty inches in height, and a corresponding height of aperture 66o: in the cabinet. :Such a. receiver produces an image approximately thirty b-y fifty Yinches at a distance of about ten feet with an angle ofoscillation of about tWenty-iive degrees.

While I have described my invention in certain preferred embodiments, I desire it understood that modications may be made and-that I intend no limitations upon my invention except as may be imposed by the appended claims.

What I claim as new and desire to secure `by Letters Patent of the United States is as follows:

1. In a television system, in combination, means for unidirectionally scanning an .object to be televised by simultaneously modulating a .pluralitv of sub-carrier currents of different frequencies by the light intensity on a corresponding plurality of linearly disposed points in the object; and means for reproducing an image of the object televised comprising a source of light, means individually responsive to the sub-carrier currents: and so constructed and arranged with respect to said source of light that light from said source vis varied in intensity in accordance with the modulation of said sub-carrier currents, means for deflecting the light from said source in synchronism with said scanning means, and a screen disposed in the path of the deflected light.

2. In a television system, in combination,

means for unidirectionally scanning an object to be televised comprising a photoelectric device the point at which the shutters are fixed vibrates having a y,plurality -of photosensitive` elements .disposedin linear relation, and means for mov- .ing said device ina ireciprocatory path for scanning `an object to be televised,.the light intensity .on each -of said photosensitive elements being employed to modulate a separate sub-carrierour- .rent;.-and means forreproducing an image of the object televised comprising a source of light,

vmeans individually .responsive to the sub-carrier .currents Aand so yconstructed and arranged with respect to said source of light that light from said .sourceis `varied inintensity in accordance with the modulation of said sub-carrier currents,

means for deiiecting the light from said source in synchronism with said scanning means, and a screen disposed in the path of the deflected light.

3. .In a television system, in combination, means rfor unidirectionally scanning motion picture lm having a series of images to be televised-comprising aprieto-electric device having a. plurality of photosensitive elements disposed in linear relation parallel with the Width of said iilm, and means` for moving said film at a constant speed with respect to said photoelectric device, the light intensity on each of said photolsensitive elements `being employed to modulate a separate sub-'carrier current; and means for reproducing the images televised comprising a source of light, vmeans individually responsive to vthe sub-carrier currents and so constructed and .arranged with respect to said source of light Athat light from said source is varied in intensity in accordance with the modulation of said subv .carrier currents, means for deflecting the light from said source in. synchronism with said scanning means, anda screen disposed in the path of the deflected light.

4. The combination dened in claim 3 with the last said means comprising a rotatable mirror device so constructed and arranged that light from said source is deflected in a predetermined larc in synchronism with the scanning of each image on said film.

5. In a .television system, in combination, means for unidirectionally scanning motion picture film having a series of images to be televised comprising means for intermittently driving vsaid film, aphotoelectric device having a plurality of photosensitive elements disposed inv linear relation, and means for moving said device in a reciprocatory path in synchronism with the intermittent movement of said film for scanning each image thereon, the light intensityon each of said photosensitive elements being employed to modulate a separate subi-carrier current; and means .for reproducing the images .televised comprising a source of light, means individually respo-nsive to the sub-carrier currents and so constructed yand arranged with respect togsaid sourceV of light that light -from said source is Varied in intensity in accordance vwith the modulation of said sub-carrier currents, means for deflecting the light fromy said vsource in synchronism with said scanning means,

movement of said lm.

' 7.".The combination defined in claim 2 .withA the last said means comprising an oscillatory mirror device so constructed and arranged that light from said source is deflected in a predetermined arc in synchronism with the reciprocation of said photoelectric device.

8. In a television system, means for unidirectionally scanning an object to be televised comprising a photoelectric device having a plurality of photosensitive elements disposed in linear relation, and means for moving said device in a reciprocatory path for scanning the object, including a carriage for said device having rollers, rails engaged by said rollers, and reciprocating motor means connected with said carriage.

9. In a television system, a photoelectric device for unidirectionally scanning an object to be televised comprising an envelope, a plurality of photosensitive cathode elements disposed in linear relation within said envelope, an anode structure comprising a pair of plate members co-extensive with said cathode elements and disposed with adjacent longitudinal edges thereof separated so as to form a slit adapted to pass a beam of light to said photosensitive cathode elements, said envelope being transparent in the portion thereof adjacent said slit, and connections from each of said cathode elements and said anode structure extending through said envolepe, said photoelectric device being adapted to scan an object by relative movement thereof with respect to said object in a direction normal to the photosensitive elements in said linear relation, the light intensity on each of said photosensitive elements being employed to modulate a separate sub-carrier current.

1U. In a television system, means for reproducing an image of an object televised from a complex current including a plurality of modulated sub-carrier currents of different frequency, comprising translating means including means individually responsive to the sub-carrier currents for producing a heteroluminous beam of light formed of individual rays of light corresponding in number to and varying in intensity respectively with said modulated currents, reconstructing means including means for deflecting said beam in accordance with a predetermined scanning operation, and a screen disposed in the path of the deflected beam.

11. In a television system, means for reproducing an image of an object televised from a complex current including a plurality of modulated sub-carrier currents of dierent frequency,

. bers in varying amplitudes dependent upon the modulations of the respective modulated current, whereby a heteroluminous beam of light is produced, means for deflecting said beam in accordance with a predetermined scanning operation, and a screen disposed in the path ofthe deflected beam.

12. In a television system, means for reproducing an image of an object televised, as set forth in claim 11 and wherein said closure member actuating means includes a magnetic core structure having an actuating coil mounted thereon and energized by the complex current, said tuned vibratible members being magnetic and disposed with respect to said core structure for actuation by the magnetic field produced by the complex current in said actuating coil, each of said tuned vibratible members being individually responsive to the component of corresponding frequency in the complex magnetic field.

13. In a television system, means for reproducing an image of an object televised, as set forth in claim 11 and wherein closure member actuating means includes a substantially U-shaped core structure having elongated pole pieces and an actuating coil energized by the complex current, and means for mounting said tuned vibratible members by one end thereof with the opposite end disposed between said pole pieces, said tuned vibratible members being magnetic and adapted to be individually responsive to the component of corresponding frequency in the complex magnetic eld produced lby said complex current.

14. In a television system, means for reproducing an image of an object televised, as set forth in claim 1l and wherein said closure member actuating means includes a substantially U- shaped core structure having elongated pole pieces and an actuating coil energized by the complex current, and means for mounting said tuned vibrating members at opposite ends therel of with the middle portions thereof disposed between said pole pieces, said tuned vibratible members being magnetic and adapted to be individually responsive to the component of corresponding frequency in the complex magnetic field produced by said complex current.

15. In a television system of the type described, employing an elongated lamp as a source of light for reproducing an image, in combination therewith a plurality of linearly disposed shutter members each comprising a strip member folded substantially upon itself and having a wing portion at each extremity bent so as to lie in a single plane and constituting the shutter portion of the member, the folded portion of the member havingactuating means connected therewith for controlling the operation of said shutter portion.

16. In a television system of the type described, employing an elongated lamp as a source of light for reproducing an image, in combination therewith a plurality of linearly disposed shutter devices each comprising a pair of apertured plate members normally disposed with the apertures therein closed by overlapping portions of the plate members, a pivoted crank member, a pair of rod members connected with said plate members respectively and with opposite ends of said crank member, one of said rod members having actuating means connected therewith, said plate members being adapted to move in opposite directions whereby the apertures therein move into alignment for eiecting the operation of said shutter device.

17. In a television receiving Vsystem of the type described, employing an elongated lamp as a source of light for reproducing an image, and synchronized means for deecting a heteroluminous beam of light from said lamp, in combination therewith a cabinet structure housing said means and having an elongated flared opening therein for permitting the deflected beam to be directed to a predetermined distance outside said cabnet structure, said distance being in proportion to the length of said elongated opening.

WALTER SOLLER. 

